A method for identifying the authenticity of Longjing tea combined with multiple detection technologies
A technology of authenticity identification and detection technology, which is applied in the field of tea traceability, can solve the problems of hidden safety hazards of the digestion instrument, the inability to withstand excessive pressure, and the limited pressure of the outer tank of the microwave digestion instrument, so as to reduce the probability of calculation errors and ensure accuracy. performance, improving accuracy
Active Publication Date: 2021-09-03
CHINA JILIANG UNIV
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[0004] Longjing tea needs to use a variety of instruments, and the microwave digestion instrument is one of them. Because the outer tank of the microwave digestion instrument has limited pressure and cannot withstand high pressure, there are certain safety hazards in the use of the digestion instrument. The service life is not high
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[0031] A method for identifying the authenticity of Longjing tea combined with multiple detection technologies, including: a. Processing before spectrum collection of tea samples: the number of samples outside the Longjing tea production area > 100, and the proportion of samples within 50 kilometers around the production area > 50%; the number of samples in the Longjing tea production area is 2 to 3 times that of samples outside the production area, and the sampling scope covers all production enterprises in the main production areas, and each enterprise should have no less than 3 samples; b. Near-infrared spectrum of tea samples Acquisition: near-infrared detection parameters: 64 scans, the characteristic spectral band is the average of 64 scans, and the scan range is 12000-4000cm -1 , the interval of data points is 1.928 cm -1 , the room temperature was controlled at 20-25°C during collection, and the spectrum of each sample was collected once; c. Determination of the four s...
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The invention discloses a method for identifying the authenticity of Longjing tea combined with multiple detection technologies, including: a. processing before spectrum collection of tea samples; b. collection of near-infrared spectra of tea samples; c. determination of Longjing tea samples from different origins Mass spectrometry data of four stable isotopes of hydrogen, oxygen, nitrogen and carbon; d. Determination of four trace elements data of cesium, copper, calcium and rubidium in Longjing tea from different regions; e. Determination of amino acid data of Longjing tea samples from different origins; f. Near-infrared, stable isotope, trace element, amino acid data establish the identification database of Longjing tea from different origins; g, measure near-infrared characteristic spectrum data, stable isotope mass spectrum data, trace element data and amino acid data; If the prediction result is less than 0, it is judged that the sample to be tested is a sample outside the Longjing tea production area; if the prediction result is greater than 0, it is judged that the sample to be tested is a sample from the Longjing tea production area.
Description
technical field [0001] The invention belongs to the technical field of tea traceability, and in particular relates to a method for identifying the authenticity of Longjing tea combined with multiple detection technologies. Background technique [0002] With the establishment of TRIPS on January 1, 1995, the protection of geographical indications has attracted the attention of various countries. With the development of the economy and the development of the market, the correct use and protection of geographical indications is becoming more and more important. But on the other hand, many enterprises have greatly reduced the competitiveness of their agricultural products in the international market due to ignoring the use of geographical indications. Therefore, how to protect geographical indications from abuse and counterfeiting has attracted the attention of experts from various countries. All in all, there is a lack of an effective identification method for geographical in...
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IPC IPC(8): G01N21/359G01N21/31G01N27/62G01N1/44G01N27/626
CPCG01N21/255G01N21/3103G01N27/62G01N1/44G01N2021/3114
Inventor 付贤树叶子弘洪雪珍俞晓平王正亮张明洲刘光富张蓬军陈飞杰
Owner CHINA JILIANG UNIV